diffusion
/dɪˈfjuːʒən/noun
mass noun
1- the spreading of something more widely传播; 扩散, 散播：
the diffusion of Marxist ideas.
马克思主义思想的传播。
1.1
- the action of spreading the light from a light source evenly so as to reduce glare and harsh shadows漫射。
1.2
- the intermingling of substances by the natural movement of their particles扩散, 弥漫：
the rate of diffusion of a gas.
气体扩散的速度。
1.3
- Anthropology the dissemination of elements of culture to another region or people【人类学】（文化因素向其他地区或民族的）传播, 流传。
派生词
diffusionism
noun （Anthropology【人类学】）diffusionist
adjective & noun （Anthropology【人类学】）diffusive
adjective （Chemistry【化】）词源
late Middle English （in the sense 'pouring out, effusion'）： from Latin diffusio（n-）, from diffundere 'pour out'.